The micrometer adjustment sets the horizontal position of the head, allowing fine adjustment to the depth of cut. The head moves in and out freely, with a spring holding the assembly in the out position. You just push to feed across the face of the wheel.I believe on the proper ones it has a fine handwheel to rotate the bar and this attachment in to the grinding wheel?
...has a lever on it that stops against a threaded stop but it's not a particularly fine thread maybe 1mm.
Thanks you're welcome.Nice job on the threading and thanks for getting the photos!
I guess the housing is stepped. Do you know what the through bore size is?
I may use er40, I want the largest spindle size/bore possible so may remove bearings completely, as its not like it will be spinning fast or often.
Bit tight fit
That nut is as tight as I could make it with a collet in it. So clearance is clearance !Have you checked it does not touch when gripping something at the minimum size of the ER collet?
I guess the ultimate test is to remove the collet and screw the nut on until it bottoms out on the threads.
You could always shave 1mm off the back of the nut if there is a problem.
Yes thanks t's close but does fit. Might need to extend the shaft a bit as we have moved 13mm further forward.Does the ER holder still allow for the use of the centreline aligning lever? It's quite important to the operation of the thing.
Thanks I'll have a look at mine. It's probably usable for short D bits.It's 90 degrees straight up and down on mine right down the centre line. Easiest way to make one would be to turn a shaft with a disk on the end then cut the disc off rough and then surface grind it down to half original diameter.
A good sliding fit will be smoother and with less play than bearings in my experience, particually with a squirt of oil in the bore. Also higher load capacity. Ofcourse that depends how well the bore is turned, it may need to go in the lathe first if its rough.Bearings are nice for the user experience side even then degree wheel has its own bearing.